<template>
  <view class="goods-detail-container" v-if = 'goods_info.goods_name'>
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item,i) in goods_info.pics" :key = "i">
        <image :src = "item.pics_big" @click="preview(i)"></image>
      </swiper-item>

    </swiper>
    
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">￥{{goods_info.goods_price}}</view>
      <!-- 信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名称 -->
        <view class="goods-name">{{goods_info.goods_name}}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费 </view>
    </view>
    
    <!-- 商品富文本 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    
<!-- 商品导航组件 -->
<view class="goods_nav">
  <!-- fill 控制右侧按钮的样式 -->
  <!-- options 左侧按钮的配置项 -->
  <!-- buttonGroup 右侧按钮的配置项 -->
  <!-- click 左侧按钮的点击事件处理函数 -->
  <!-- buttonClick 右侧按钮的点击事件处理函数 -->
  <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
</view>
  </view>
</template>

<script>
  import { mapState , mapMutations,mapGetters} from 'vuex'
  export default {
    watch:{
       total: {
         // 1. 监听 total 值的变化，通过第一个形参得到变化后的新值
         handler(newVal){
           // 2. 通过数组的 find() 方法，找到购物车按钮的配置对象
             const findResult = this.options.find((x) => x.text === '购物车')
           // 3. 动态为购物车按钮的 info 属性赋值
             findResult.info = newVal
         },
          immediate: true
       }
    },
    computed:{
      ...mapState('m_cart',[]),
      ...mapGetters('m_cart',['total'])
    },
    data() {
      return {
         goods_info: {},
         options: [ {
                     icon: 'shop',
                     text: '店铺',

                 }, {
                     icon: 'cart',
                     text: '购物车',
                     info: 0,
                     infoColor:"#ffffff"
                 }],
          buttonGroup: [{
                   text: '加入购物车',
                   backgroundColor: '#ff0000',
                   color: '#fff'
                 },
                 {
                   text: '立即购买',
                   backgroundColor: '#ffa200',
                   color: '#fff'
                 }
                 ]
      };
    },
    onLoad(options) {
       const goodId = parseInt(options.goods_id)
       console.log( goodId)
        this.getGoodsDetail(goodId)
    },
    methods:{
      ...mapMutations('m_cart',['addToCart']),
      async getGoodsDetail(goods_id){
       const { data: res } = await uni.$http.get('https://api-hmugo-web.itheima.net/api/public/v1/goods/detail',{goods_id})
           if (res.meta.status !== 200) return uni.$showMsg()
           // 为 data 中的数据赋值
           res.message.goods_introduce=res.message.goods_introduce.replace(/<img/g , '<img style="display:block;"').replace(/webp/g,'jpg')
           this.goods_info = res.message
      },
      preview(i){
        uni.previewImage({
          current:i,
          urls:this.goods_info.pics.map(x => x.pics_big)
        })
      },
      onClick (e) {
            if(e.content.text === '购物车')
            uni.switchTab({
              url:'/pages/cart/cart'
            })
            },
      buttonClick(e){
        console.log(e)
        if(e.content.text === '加入购物车'){
           const goods ={
              // { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
                   goods_id: this.goods_info.goods_id,       // 商品的Id
                   goods_name: this.goods_info.goods_name,   // 商品的名称
                   goods_price: this.goods_info.goods_price, // 商品的价格
                   goods_count: 1,                           // 商品的数量
                   goods_small_logo: this.goods_info.goods_small_logo, // 商品的图片
                   goods_state: true                         // 商品的勾选状态
           }
           this.addToCart(goods)
        }
      }
    }
  }
</script>

<style lang="scss">
  swiper{
   height: 750rpx;
   image{
     width: 100%;
     height: 100%;
   }
 }
 // 商品信息区域的样式
 .goods-info-box {
   padding: 10px;
   padding-right: 0;
 
   .price {
     color: #c00000;
     font-size: 18px;
     margin: 10px 0;
   }
 
   .goods-info-body {
     display: flex;
     justify-content: space-between;
 
     .goods-name {
       font-size: 13px;
       padding-right: 10px;
     }
     // 收藏区域
     .favi {
       width: 120px;
       font-size: 12px;
       display: flex;
       flex-direction: column;
       justify-content: center;
       align-items: center;
       border-left: 1px solid #efefef;
       color: gray;
     }
   }
 
   // 运费
   .yf {
     margin: 10px 0;
     font-size: 12px;
     color: gray;
   }
 }
 
 .goods_nav{
   position: fixed;
   bottom: 0;
   left: 0;
   width: 100%;
 }
 .goods-detail-container{
   padding-bottom: 100rpx;
 }
</style>
